Assayer s furnace



No. 608,883. Patented Aug. 9, |898.

J. J. LNERGAN & A. C. CALKINS.

ASSAYERS FURNACE.

(Application filed Jan. 12, 1898.)

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" maar f JOllN J. LONERGAN AND ALBERT C. GALKINS, OF LOS ANGELES, CALIFORNIA.

AssAYEae FORNACE.

SPCIFICATON forming part of Letters Patent No. 608,883, dated August 9, 1898. Application filed January l2, 1898. Serial No. 666,436. (No model.)

To all whom it may concern: A

Be it known that We, JOHN J. `LONEROTAN and ALBERT C. CALKINs, of'Los Angeles, in the county of Los Angeles and State of California, have invented'a new and useful Improvement in Assayers Furnaces, of which the following is a specification.

As is well known to those skilled in the use of muffle and allied furnaces, more especially those in which a highly-volatile hydrocarbon, such as gasolene, is employed as fuel', the oxidation of the charges is defective, so that cupellation is practically impossible in a large portion of the mufile and is effected slowly and imperfectly even in the remaining portion. To remove this objection, We provide an attachment for the class of furnaces referred to whereby oxidation is promoted to such a degree that cupellation is effected rapidly and completelyin all parts of the mufie.

Ourinvention is embodied in the construction and combination of parts, as hereinafter described.

In the accompanying drawings, Figure l is a perspective view of a mufiie-furnace provided wth our improvement. Fig. 2 is a longitudinal vertical section of the same.

The body of the furnace a and the muiile Y) y therein are shown arranged and the former provided with a flue c in a Well-known manner. Instead of the mufe h being closed at its inner or rear end it is provided with an opening l, that communicates with a hori-v zontal passage 2 in the adjacent end Wall of the furnace a, and said Wallis also constructed with a boss or tubular extension 3, as shown. Our tubular oxidizing attachmen tH is shown connecting such boss 3 with the furnace-iiue c-that is to say, the same consists of an angular sheet-metal pipe or tube 4, one end of which engages the furnace-boss or extension 3 and the other orupper fend is per# manently attached to the mainline c. Such pipe or tube 4 is also provided with a damper 5, which may be adjusted as required. A The heat in the main flue c creates by induction a draft of air in the attachment 4 andthrough the muiile b. The increased quantity of airthus drawn into the latter furnishes a plentiful supply of oxygen, so that the cupel charges are rapidly and completely Aoxidized in all parts of the muifle h. In this operation the unconsumed gases and fumes pass through the attachment into the main iiue. Thus by this simple and inexpensive attachment the Work ofthe furnace is greatly promoted and rendered practically uniform and complete.

l. The improved assaying-furnace, adapted for burning gasolene or other hydrocarbon, the same comprising the body or casing a, having the rear horizontal passage 2, the muflie having a rear opening registering with such passage, the rear tubular extension or boss 3, the main flue attached to top of the furnace, and the oxidizing attachment, consisting of the exterior pipe 4, connecting the aforesaid boss and main flue, and provided with a damper, as shown and described.

2. The improved assaying-furnace, comprising the body ahaving the rear passage 2, the muiiie arranged with its inner end pro- `vided with'an opening and separated from the rear wall of saidbody, save where the passage and opening coincide, the main iiue,

vand the oxidizing attachment consisting of an exterior pipe which connects the aforesaid passage and main flue, as shown and de scribed.

JOI-IN J. LONERGAN. 4 ALBERT C. CALKINS.

Witnesses:

G. G. JOHNSON, G. l?. OONANT. 

